On Sun, Nov 29, 2009 at 10:45:16AM -0500, Alan Stern wrote: > On Sun, 29 Nov 2009, Jason Byrne wrote: > > > Hi, > > > > I've tried several stable kernel versions with an isd200 usb2 cradle, > > and it seems that the last working kernel version with this device may > > be 2.6.26.8. > > > > I'm not sure if this was related to the separation of the isd200 > > driver into a separate module, or if it's an ehci_hcd issue, or what > > the cause is... > > You should collect a pair of usbmon traces, one from a working kernel > and one from a recent non-working kernel. See > Documentation/usb/usbmon.txt for instructions. It looks like the working version doesn't use high-speed, only full speed. Try rmmod'ing ehci_hcd on the newer kernel and then attaching the device. Matt -- Matthew Dharm Home: mdharm-usb@xxxxxxxxxxxxxxxxxx Maintainer, Linux USB Mass Storage Driver What, are you one of those Microsoft-bashing Linux freaks? -- Customer to Greg User Friendly, 2/10/1999
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